Dielectronic Recombination of Br-Like Tungsten Ions

LI Maijuan(李麦娟); FU Yanbiao(符彦飙); SU Maogen(苏茂根); DONG Chenzhong(董晨钟); Koike FUMIHIRO

doi:10.1088/1009-0630/16/3/02

Plasma Science and Technology > 2014 > 16(3): 182-187. > DOI: 10.1088/1009-0630/16/3/02

LI Maijuan(李麦娟), FU Yanbiao(符彦飙), SU Maogen(苏茂根), DONG Chenzhong(董晨钟), Koike FUMIHIRO. Dielectronic Recombination of Br-Like Tungsten Ions[J]. Plasma Science and Technology, 2014, 16(3): 182-187. DOI: 10.1088/1009-0630/16/3/02

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Dielectronic Recombination of Br-Like Tungsten Ions

1 Key Laboratory of Atomic and Molecular Physics & Functional Material of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China 2 Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730070, China 3 Atomic and Molecular Data Research Center, National Institute for Fusion Science, Kitasato 509-5292, Japan

Funds: supported by the International Atomic Energy Agency (No.16266), National Natural Science Foundation of China (Nos.91126007, 11064012)

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Received Date: January 17, 2013

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Abstract

Accurate data for dielectronic recombination of tungsten ions are essential in the modeling of tungsten impurity transport and radiative power loss in International Thermonuclear Experimental Reactor (ITER). Theoretical calculations have been made for dielectronic recombi- nation (DR) rate coefficients of Br-like tungsten ions using a flexible relativistic atomic code (FAC) from 1 eV to 50 keV. Level-by-level calculations are carried out for evaluating the contributions to DR through all the relevant Kr-like tungsten ions autoionizing inner-shell excited configuration complexes: (3s ² 3p ⁶ 3d ¹⁰ )⁻¹ 4s ² 4p ⁵ nln 'l' (n = 4-5, n ' = 4-100, l ' = 0-8), (4s ² 4p ⁵ )¹ nln' l' (n = 4-6, n' = 4-100, l' = 0-12). Comparison of the rate coefficients for 3s, 3p, 3d, 4s and 4p subshell excitations shows that the 4p subshell excitation dominates over the whole temperature region, 4s subshell excitation at low temperature and 3p, 3d subshell excitations at high temperature can not be neglected. In order to facilitate simple applications, the total DR rate coefficient, Δn = 0, 1 and 2 core excitations DR rate coefficients are fitted to an empirical formula.
- Br-like tungsten,
- dielectronic recombination,
- rate coefficients

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